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"""
jukeboxactivity.py
Activity that plays media.
Copyright (C) 2007 Andy Wingo <wingo@pobox.com>
Copyright (C) 2007 Red Hat, Inc.
"""
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA
import logging
from gettext import gettext as _
import os
from sugar.activity import activity
import pygtk
pygtk.require('2.0')
import sys
import gobject
import pygst
pygst.require('0.10')
import gst
import gst.interfaces
import gtk
import urllib
class JukeboxActivity(activity.Activity):
UPDATE_INTERVAL = 500
def __init__(self, handle):
activity.Activity.__init__(self, handle)
self.set_title(_('Jukebox Activity'))
toolbox = activity.ActivityToolbox(self)
self.set_toolbox(toolbox)
self.toolbar = toolbar = ControlToolbar(toolbox, self)
toolbox.add_toolbar(_('Play'), toolbar)
toolbar.show()
toolbox.show()
self.connect("shared", self._shared_cb)
if handle.uri:
pass
elif self._shared_activity:
if self.get_shared():
pass
else:
# Wait for a successful join before trying to get the document
self.connect("joined", self._joined_cb)
self.update_id = -1
self.changed_id = -1
self.seek_timeout_id = -1
self.player = None
self.uri = None
self.p_position = gst.CLOCK_TIME_NONE
self.p_duration = gst.CLOCK_TIME_NONE
self.videowidget = VideoWidget()
self.set_canvas(self.videowidget)
self.player = GstPlayer(self.videowidget)
self.player.connect("error", self._player_error_cb)
self.player.connect("eos", self._player_eos_cb)
self.show_all()
if handle.uri:
self.uri = handle.uri
gobject.idle_add(self._start, self.uri)
def _player_error_cb(self, widget, err, debug):
# Xepyhr doesn't have the Xvideo extension, so for
# jhbuild we switch to ximagesink on-the-fly
if "Resource busy or not available" in str(err):
logging.debug("Retrying with ximagesink...")
self.player.switch_to_ximagesink()
gobject.idle_add(self._start, self.uri)
def _player_eos_cb(self, widget):
self.player.seek(0L)
self.play_toggled()
def _joined_cb(self, activity):
logging.debug("someone joined")
pass
def _shared_cb(self, activity):
logging.debug("shared start")
pass
def read_file(self, file_path):
self.uri = "file://" + urllib.quote(os.path.abspath(file_path))
gobject.idle_add(self._start, self.uri)
def _start(self, uri=None):
if not uri:
return False
# FIXME: parse m3u files and extract actual URL
self.player.set_uri(uri)
self.play_toggled()
self.show_all()
return False
def play_toggled(self):
if self.player.is_playing():
self.player.pause()
self.toolbar.set_button_play()
else:
self.player.play()
if self.update_id == -1:
self.update_id = gobject.timeout_add(self.UPDATE_INTERVAL,
self.update_scale_cb)
self.toolbar.set_button_pause()
def scale_button_press_cb(self, widget, event):
self.toolbar.button.set_sensitive(False)
self.was_playing = self.player.is_playing()
if self.was_playing:
self.player.pause()
# don't timeout-update position during seek
if self.update_id != -1:
gobject.source_remove(self.update_id)
self.update_id = -1
# make sure we get changed notifies
if self.changed_id == -1:
self.changed_id = self.toolbar.hscale.connect('value-changed',
self.scale_value_changed_cb)
def scale_value_changed_cb(self, scale):
# see seek.c:seek_cb
real = long(scale.get_value() * self.p_duration / 100) # in ns
self.player.seek(real)
# allow for a preroll
self.player.get_state(timeout=50*gst.MSECOND) # 50 ms
def scale_button_release_cb(self, widget, event):
# see seek.cstop_seek
widget.disconnect(self.changed_id)
self.changed_id = -1
self.toolbar.button.set_sensitive(True)
if self.seek_timeout_id != -1:
gobject.source_remove(self.seek_timeout_id)
self.seek_timeout_id = -1
else:
if self.was_playing:
self.player.play()
if self.update_id != -1:
self.error('Had a previous update timeout id')
else:
self.update_id = gobject.timeout_add(self.UPDATE_INTERVAL,
self.update_scale_cb)
def update_scale_cb(self):
self.p_position, self.p_duration = self.player.query_position()
if self.p_position != gst.CLOCK_TIME_NONE:
value = self.p_position * 100.0 / self.p_duration
self.toolbar.adjustment.set_value(value)
return True
class ControlToolbar(gtk.Toolbar):
def __init__(self, toolbox, jukebox):
gtk.Toolbar.__init__(self)
self.toolbox = toolbox
self.jukebox = jukebox
self.pause_image = gtk.image_new_from_stock(gtk.STOCK_MEDIA_PAUSE,
gtk.ICON_SIZE_BUTTON)
self.pause_image.show()
self.play_image = gtk.image_new_from_stock(gtk.STOCK_MEDIA_PLAY,
gtk.ICON_SIZE_BUTTON)
self.play_image.show()
self.button = gtk.ToolButton()
self.button.set_icon_widget(self.play_image)
self.button.set_property('can-default', True)
self.button.show()
self.button.connect('clicked', self._button_clicked_cb)
self.insert(self.button, -1)
self.adjustment = gtk.Adjustment(0.0, 0.00, 100.0, 0.1, 1.0, 1.0)
self.hscale = gtk.HScale(self.adjustment)
self.hscale.set_draw_value(False)
self.hscale.set_update_policy(gtk.UPDATE_CONTINUOUS)
self.hscale.connect('button-press-event', jukebox.scale_button_press_cb)
self.hscale.connect('button-release-event', jukebox.scale_button_release_cb)
self.scale_item = gtk.ToolItem()
self.scale_item.set_expand(True)
self.scale_item.add(self.hscale)
self.insert(self.scale_item, -1)
def _button_clicked_cb(self, widget):
self.jukebox.play_toggled()
def set_button_play(self):
self.button.set_icon_widget(self.play_image)
def set_button_pause(self):
self.button.set_icon_widget(self.pause_image)
class GstPlayer(gobject.GObject):
__gsignals__ = {
'error': (gobject.SIGNAL_RUN_FIRST, None, [str, str]),
'eos' : (gobject.SIGNAL_RUN_FIRST, None, [])
}
def __init__(self, videowidget):
gobject.GObject.__init__(self)
self.playing = False
self.player = gst.element_factory_make("playbin", "player")
imagesink = gst.element_factory_make("xvimagesink", "xvimagesink")
self.player.set_property("video-sink", imagesink)
r = gst.registry_get_default()
l = [x for x in r.get_feature_list(gst.ElementFactory) if (gst.ElementFactory.get_klass(x) == "Visualization")]
logging.debug(l)
if len(l):
e = l.pop() # take latest plugin in the list
vis_plug = gst.element_factory_make(e.get_name())
self.player.set_property('vis-plugin', vis_plug)
self.videowidget = videowidget
bus = self.player.get_bus()
bus.enable_sync_message_emission()
bus.add_signal_watch()
bus.connect('sync-message::element', self.on_sync_message)
bus.connect('message', self.on_message)
def set_uri(self, uri):
self.player.set_property('uri', uri)
def on_sync_message(self, bus, message):
if message.structure is None:
return
if message.structure.get_name() == 'prepare-xwindow-id':
self.videowidget.set_sink(message.src)
message.src.set_property('force-aspect-ratio', True)
def on_message(self, bus, message):
t = message.type
if t == gst.MESSAGE_ERROR:
err, debug = message.parse_error()
logging.debug("Error: %s - %s" % (err, debug))
self.emit("eos")
self.playing = False
self.emit("error", str(err), str(debug))
elif t == gst.MESSAGE_EOS:
self.emit("eos")
self.playing = False
def switch_to_ximagesink(self):
self.player.set_state(gst.STATE_NULL)
imagesink = gst.element_factory_make("ximagesink", "ximagesink")
self.player.set_property("video-sink", imagesink)
def query_position(self):
"Returns a (position, duration) tuple"
try:
position, format = self.player.query_position(gst.FORMAT_TIME)
except:
position = gst.CLOCK_TIME_NONE
try:
duration, format = self.player.query_duration(gst.FORMAT_TIME)
except:
duration = gst.CLOCK_TIME_NONE
return (position, duration)
def seek(self, location):
"""
@param location: time to seek to, in nanoseconds
"""
event = gst.event_new_seek(1.0, gst.FORMAT_TIME,
gst.SEEK_FLAG_FLUSH | gst.SEEK_FLAG_ACCURATE,
gst.SEEK_TYPE_SET, location,
gst.SEEK_TYPE_NONE, 0)
res = self.player.send_event(event)
if res:
self.player.set_new_stream_time(0L)
else:
logging.debug("seek to %r failed" % location)
def pause(self):
logging.debug("pausing player")
self.player.set_state(gst.STATE_PAUSED)
self.playing = False
def play(self):
logging.debug("playing player")
self.player.set_state(gst.STATE_PLAYING)
self.playing = True
def stop(self):
self.player.set_state(gst.STATE_NULL)
logging.debug("stopped player")
def get_state(self, timeout=1):
return self.player.get_state(timeout=timeout)
def is_playing(self):
return self.playing
class VideoWidget(gtk.DrawingArea):
def __init__(self):
gtk.DrawingArea.__init__(self)
self.imagesink = None
self.unset_flags(gtk.DOUBLE_BUFFERED)
self.set_flags(gtk.APP_PAINTABLE)
def do_expose_event(self, event):
if self.imagesink:
self.imagesink.expose()
return False
else:
return True
def set_sink(self, sink):
assert self.window.xid
self.imagesink = sink
self.imagesink.set_xwindow_id(self.window.xid)
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